Signal device for indicating speed.



No. 825,960. I PATENTED JULY 17. 1906.

H."DAH L& MVMARTIN, SIGNAL DEVICE FOR INDIGATING SP ED;

APPLICATION FILED APR. 22. 1905.

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SEGNAL. DEViOE POW 'lhifilfiitfi'ihifi SPEEE..

Specification of Letters Patent.

Application filed April22,1905. Serial in; 257-.018.

To all whom it may concern:

Be it known that we, HANS DAHL, a subject of the King of Norway, endMAX iVIARTIN, 9. subject of the German Emperor, residents of Berlin, in the Kingdom of Prussia and German Empire, have invented new and useful Improvements in Signal Devices for Ind1cattrivsnce is arranged in such manner thet'it can be rotated otherwise i 'ved by s. rotating body; of any suitable kii. While it is arrested independently of the said rotating body by other appropriate means actuated by the body Whose speed is to be indicated on each occasion of such speed cverstepping a certain predetermined speed iiniit or one of a. series of such limits, the group of speeds contained between each two such limits being distinctively cheriicterized on the signs} contrivence.

An essential feature of our invention is that the energy necessary for rot signal eon "vdnce does not ha e t plied by the niestns employed "hr-r such contrivence, as this would gres fere with the accuracy of the indicntionnnd .evcn render such illusory. The signal contrive-nee therefore is driven by a source of energy independent of such arresting device-as, for example, by the body-Whose speed is to be indicated, such as a motor-cs1 axle. This constitutes agreat advantage over prior apparatus for esiniilsr purpose.

()ur inventionis illustrated in the accompanying drawings, in which- Figure 1 is a vertical section of the signal device. Fig. 2 is a. rear view of the arrestingplate. Fig.- 3 is a sectional view taken at right angle to Fig. 1 0nthe line f g.

G'is a casing of any suitable description furnished with a Window F. In this casing bearings are provided for a short shaft B, on which is mounted e. sleeve A, which tits sutficiently tightiy to be frictions-11y rotated by the shaft Be At oneend the sleeve is rigidly attached to the signsi-disk S, provided with difterentiy-coiored partners or compartments,

each or which is destined to signal acertain group of speeds, being visihietltn'ough the window F in the casing. At the other end of the sleeve is an arresting device consisting of a plate P, the redial arms P of which increase successively in length, as shown in Fig. 2. On these :1 its? are pivoted. at m successively nearer to thecenter f the piste P catches F" .11", extent of Whose motion is li... ited hf, st is it n. i

- the shaft C Whose speed is to he indics .d there is mounted within. the casing G. a. f cc 0, which presents bearings for aims zc: s.l axis D. On the latter is mounted the are; H, having at its ends balanced diemet ricztiiy-opposed centrifugal members id. s gee: e

Mounted on the axis i) is 2 ing with s hich L,- nicented on 9.- second axis c, csrricd by the f: is (l end mounted on it a second gem meshes with the tor he bent v tics-i he? K, slit hi, secured to the tremehearings st G G in the cosin G. This 53.31% M has mounted on it c bevee-gesr 31-, meshing with s second cevei-geer 21*, mounted on the shaft 55.

At the top of the recipes" is mounted wheel or d engage w the horizontal arms of catches h The operetii t first-us is as foliowszOn the s t J rot sing it viiii revolve the frenie O and shaft M, whereby, by means of thegears Z '2, the shaft-1 s will also he retated and with it the signal-d. S.- Giving to rotation of the frame C, reover, the centrifugal ineinbers hi it was cut more or iess, depending upon the speed end ..evin its will turn the axis D correspondingiy. Theg goers J L meshing together \vili cause the gear Q to engage with the rack K, whereby the bar K will be elevated. Tine will bring the wheel N into the peth of rotation of one of the catches h h, which being thus stopped visiblyindicated at the window. On the {,resting the signal eontrivanec independently speed of the shaft C increasing or decreasing I .to such an extent that it is no longer con tained within the said speed group indicated by the displayed panel the wheel X responding to the action of the centrifugal members R R will rise or fall. respectively,and will thus come in contact with the eateh 72 It of one of the longer or shorter arms P of the plate 1. The dish S will thus first be released and then again arrested by another catch engaging with the wheel N, another colored panel conseqlueiitly appearing at the window F. A spira spring I, coiled on the shaft D and secured to the arm H, acts to restore the latter to its initial position. The wheel X may be grooved to receive the extreinity of an arm T, which either directly or indirectly actuatcs a suitable recording instrument.- whereby the speed can be graphically registered, for instance, on a ribbon of paper carried by a drum driven by clock Work. One manner of recording is shown in Fig. 1. Onthe drum E there moves in wellknown manner a paper band or the like 1 adapted to be marked by'the pencil a, fixed in the arm T.

In the case of vehicles it will be found ad- .vantage'ous to so locate the apparatus. that.

the rack-bar K K lies horizontal, whereby the disturbing influence of gravity and of vertical shocks-is avoided.

Instead of a disk it. is obvious that any i, other suitable device may be usedtoindicate "35*" the groups of speeds Likewise" any form of arresting device may be. employed instead of the plate P,with.catches cooperating with l a Wheel ,N-. It will'also'be understood that I "-"we'i'n no wise desir'eto'limit ourselves to the combination with thedparticular form of ,means shown for operating the signal mem her, as the latter 'may be rotated or otherwise actuated by any suitable means, Whether mechanical, electrical; of pneumatic, Wholly "i t'speed is to be indicated.

Having thus described our invention, what independent oit the motion-,of'the body whose fyve claim as new, and desire-to secure byLet' tors -Patent, is;

1-; Asig'n-al deviceior indicating collections of-sp'eeds, comprising, in combination, a r0- tating body, signal contrivance influenced'by the movements of the said rotating body,

said signal contrivance havin indicating portions, ach portion adapted to indicate a group of the speeds between certain predev terminatedliniits and means, actuated the .-body, whose speed is tobe indicated, tor arsuch speed overstepping said limits,

of llldSZlld rotating body on each occasion of stantially as described.

2. A signal device for indicating collections of speeds, comprising,- in combination a rotating body, a signal body presenting a diskv with distinctivemarkings, each adapted to indicate a group of the speeds between certain predeterinin'ated limits, said disk influenced by the movements of the said rotating body, and. means, actuated by the body whose speed is to beindieated, for arresting the signal mmber indcpendently of the said rotating body on each occasion of such speed oversteppin'gsaid. limits, substantially asdescribed.

3. A signal device for indicating collections of speeds, comprising, in combination, a roliat ingbody, signal contrivance, influenced by the movements of the said rotating body, said signal contrivance havin indicating portio'ns, each portion adapte to indicate a group of the speeds between certain predetermined speeds and a centrifugal governor actuated by the body Whose speed is to ,be indicated, having a centrally-mounted armcarrying die-metric ally-opposed balanced members," and mechanism operated by the said centrifugal governor for arresting the signal contrivance independently of the said 5 rotating body on each occasion'of such speed overstepping said limits, substantially as described.

' 4. A signal device for indicating collect-ions of speeds, comprising, in combination, a rotating body, signal contrivance influenced by the movements of the. said'rotatingbody, said signah contrivance having indicating portions, each portion adapted to indicatea group of the speeds between certain predetermined limits and means actuated by the body Whose speed isto be indicated, for arresting thesignal contrivance independently of the said rotating body on each occasion, of

'such [speed overstepping said limits, and

means for recording the'speed, actuated by the aid of the said means for arresting the signal c'ontrivance, substantially as described. i

In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

- HANS DAHL.

MAX MARTIN.

Nitnesses:

VV LDEMAR HAUPT, HENRY HASPEILI 

